#include<stdio.h>
  
int main()
  {
	double x=3.1415,float y=15.725;
	
	printf("x=%f,y=%f\n",x,y);
	printf("x=%e,y=%e\n",x,y);
	printf("x=%f,x=%e,x=%g\n",x,x,x);
	
	return 0;
}
